<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>箭头函数</title>
    <script>
      function add1(a,b){
          console.log(a+","+b);
      }

      add1(10,20);

      let add2 = function(a,b){
          console.log(a+","+b);
      }

      add2(10,20);

      let add3 = a =>{ return  a+=10}

      let result = add3(80);

      console.log(result);
    </script>
</head>
<body>

</body>
</html>